519 



40. Neritina granosa (pi. cxiv. f. 170, 171), Sowerhy, Tank. 

 Cat. ; Conch. 111. f. 6. N. papillosa. Jay, Cat. p. 117. t. 4. f. 11. 



" N. testa rotundata, compressiuscula, subalata, alba, epider- 

 mide nigra induta, extus granosa, granis per series ordinatis ; labii 

 extern! margine crenulato; subtiis planulata ; labio coliunellari lato, 

 aurantiaco, margine interno sinuato, edentulo." 



A large ronnd shell, flat in front, and rounded at the back, 

 with the outer surface tuberculated, and covered with a thick black 

 epidermis ; the spire is lateral, and consists of scarcely more than 

 one turn ; the aperture large, greyish, crenulated at the margin, 

 divided in the centre by a yellowish septiform columella, which is 

 sKghtly rounded on the left side, and smooth and arcuated at the 

 edge. Operculum reddish brown. 



" From a fresh-water stream in one of the South Sea Islands," 

 Biidgin. Also in mountain streams. Sandwich Islands. 



41. Neritina latissima (pi. cxiv. f. 172, 173), Broderij), 

 Zool. Proc. ; Conch. lU. f. 3, 16. 



" N. testa rotundata, ventricosa, striis longitudinaHbus, minutis, 

 creberrimis, fusca luteo maculata, maculis numerosissimis ; labro 

 dilatato latissimo, spiram longe prsetereunte ; labio crenulato, 

 subluteo."^ 



Eemarkable for the manner in which the outer lip is spread out 

 into a broad wing at each end. The outside is green or brownish, 

 reticulated, and in some specimens banded with black ; the colu- 

 mella is buff, half-moon-shaped, flattish, and obtusely crenulated 

 at the edge. Operculum blackish, with a horny reddish margin. 



Adhering to rocks in the river at Realeijos. 



42. Neritina Oweniana (pi. cxiv. f. 168), Gray, Wood's 

 Suppl. f. 8. 



N. testa iV. latissinuB simillima, sed labio interno tumido, 

 margine labii externi inferni recurvo. 



Resembling N. latissima, but with the columella swelled out, 

 and the inferior spreading of the outer lip turned backwards. 



Fernando Po ; on stones in small streams. Frazer. 



43. Neritina intermedia (pi. cxiv. f. 169, 174, 175, 176), 

 Sowerby, senr.. Pro. Zool. Soc, 1832, p. 201. N. globosa, Broderip, 

 et N. tritonensis, Le Guillon. 



" N. testa suborbiculari, olivaceo-fusca, nigro reticulata ; dorso 

 subgibboso ; labio extern o intiis Isevi, albican te ; labio columellari 

 subflavo, planulato, margine centrali ruguloso." 



3x2 



